SIGMA-ALDRICH sigma-aldrich.com SAFETY DATA SHEET according to Regulation (EC) No. 1907/2006 Version 5.2 Revision Date 18.11.2013 Print Date 11.12.2013 SECTION 1: Identification of the substance/mixture and of the company/undertaking 1.1 1.2 Product identifiers Product name : Sodium hydroxide Product Number Brand Index-No. REACH No. CAS-No. : : : : : 06203 Sigma-Aldrich 011-002-00-6 01-2119457892-27-XXXX 1310-73-2 Relevant identified uses of the substance or mixture and uses advised against Identified uses 1.3 1.4 : Laboratory chemicals, Manufacture of substances Details of the supplier of the safety data sheet Company : Sigma-Aldrich Company Ltd. The Old Brickyard NEW ROAD, GILLINGHAM Dorset SP8 4XT UNITED KINGDOM Telephone Fax E-mail address : : : +44 (0)1747 833000 +44 (0)1747 833313 eurtechserv@sial.com Emergency telephone number Emergency Phone # : +44 (0)1747 833100 SECTION 2: Hazards identification 2.1 Classification of the substance or mixture Classification according to Regulation (EC) No 1272/2008 Corrosive to metals (Category 1), H290 Skin corrosion (Category 1A), H314 For the full text of the H-Statements mentioned in this Section, see Section 16. Classification according to EU Directives 67/548/EEC or 1999/45/EC C Corrosive R35 For the full text of the R-phrases mentioned in this Section, see Section 16. 2.2 Label elements Labelling according Regulation (EC) No 1272/2008 Pictogram Signal word Danger Hazard statement(s) H290 H314 May be corrosive to metals. Causes severe skin burns and eye damage. Sigma-Aldrich - 06203 Page 1 of 14 Precautionary statement(s) P280 Wear protective gloves/ protective clothing/ eye protection/ face protection. IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. Immediately call a POISON CENTER or doctor/ physician. P305 + P351 + P338 P310 Supplemental Hazard Statements 2.3 none Other hazards - none SECTION 3: Composition/information on ingredients 3.1 Substances Synonyms : Formula Molecular Weight CAS-No. EC-No. Index-No. Registration number : : : : : : HNaO 40.00 g/mol 1310-73-2 215-185-5 011-002-00-6 01-2119457892-27-XXXX Hazardous ingredients according to Regulation (EC) No 1272/2008 Component Classification Sodium hydroxide CAS-No. EC-No. Index-No. Registration number 1310-73-2 215-185-5 011-002-00-6 01-2119457892-27-XXXX Met. Corr. 1; Skin Corr. 1A; H290, H314 Hazardous ingredients according to Directive 1999/45/EC Component Classification Sodium hydroxide CAS-No. EC-No. Index-No. Registration number 1310-73-2 215-185-5 011-002-00-6 01-2119457892-27-XXXX C, R35 Concentration <= 100 % Concentration <= 100 % For the full text of the H-Statements and R-Phrases mentioned in this Section, see Section 16 SECTION 4: First aid measures 4.1 Description of first aid measures General advice Consult a physician. Show this safety data sheet to the doctor in attendance. If inhaled If breathed in, move person into fresh air. If not breathing, give artificial respiration. Consult a physician. In case of skin contact Take off contaminated clothing and shoes immediately. Wash off with soap and plenty of water. Consult a physician. In case of eye contact Rinse thoroughly with plenty of water for at least 15 minutes and consult a physician. If swallowed Do NOT induce vomiting. Never give anything by mouth to an unconscious person. Rinse mouth with water. Consult a physician. Sigma-Aldrich - 06203 Page 2 of 14 4.2 Most important symptoms and effects, both acute and delayed The most important known symptoms and effects are described in the labelling (see section 2.2) and/or in section 11 4.3 Indication of any immediate medical attention and special treatment needed no data available SECTION 5: Firefighting measures 5.1 Extinguishing media Suitable extinguishing media Use water spray, alcohol-resistant foam, dry chemical or carbon dioxide. 5.2 Special hazards arising from the substance or mixture no data available 5.3 Advice for firefighters Wear self contained breathing apparatus for fire fighting if necessary. 5.4 Further information no data available SECTION 6: Accidental release measures 6.1 Personal precautions, protective equipment and emergency procedures Wear respiratory protection. Avoid dust formation. Avoid breathing vapours, mist or gas. Ensure adequate ventilation. Evacuate personnel to safe areas. Avoid breathing dust. For personal protection see section 8. 6.2 Environmental precautions Prevent further leakage or spillage if safe to do so. Do not let product enter drains. Discharge into the environment must be avoided. 6.3 Methods and materials for containment and cleaning up Pick up and arrange disposal without creating dust. Sweep up and shovel. Keep in suitable, closed containers for disposal. 6.4 Reference to other sections For disposal see section 13. SECTION 7: Handling and storage 7.1 Precautions for safe handling Avoid formation of dust and aerosols. Provide appropriate exhaust ventilation at places where dust is formed. For precautions see section 2.2. 7.2 Conditions for safe storage, including any incompatibilities Store in cool place. Keep container tightly closed in a dry and well-ventilated place. 7.3 Specific end use(s) Apart from the uses mentioned in section 1.2 no other specific uses are stipulated SECTION 8: Exposure controls/personal protection 8.1 Control parameters Components with workplace control parameters Sigma-Aldrich - 06203 Page 3 of 14 8.2 Component CAS-No. Value Sodium hydroxide 1310-73-2 STEL Control parameters 2 mg/m3 Basis UK. EH40 WEL - Workplace Exposure Limits Derived No Effect Level (DNEL) Application Area Exposure routes Health effect Value Workers Consumers Long-term local effects Long-term local effects 1 mg/m3 1 mg/m3 Inhalation Inhalation Exposure controls Appropriate engineering controls Handle in accordance with good industrial hygiene and safety practice. Wash hands before breaks and at the end of workday. Personal protective equipment Eye/face protection Face shield and safety glasses Use equipment for eye protection tested and approved under appropriate government standards such as NIOSH (US) or EN 166(EU). Skin protection Handle with gloves. Gloves must be inspected prior to use. Use proper glove removal technique (without touching glove's outer surface) to avoid skin contact with this product. Dispose of contaminated gloves after use in accordance with applicable laws and good laboratory practices. Wash and dry hands. The selected protective gloves have to satisfy the specifications of EU Directive 89/686/EEC and the standard EN 374 derived from it. Full contact Material: Nitrile rubber Minimum layer thickness: 0.11 mm Break through time: 480 min Material tested:Dermatril® (KCL 740 / Aldrich Z677272, Size M) Splash contact Material: Nitrile rubber Minimum layer thickness: 0.11 mm Break through time: 480 min Material tested:Dermatril® (KCL 740 / Aldrich Z677272, Size M) data source: KCL GmbH, D-36124 Eichenzell, phone +49 (0)6659 87300, e-mail sales@kcl.de, test method: EN374 If used in solution, or mixed with other substances, and under conditions which differ from EN 374, contact the supplier of the CE approved gloves. This recommendation is advisory only and must be evaluated by an industrial hygienist and safety officer familiar with the specific situation of anticipated use by our customers. It should not be construed as offering an approval for any specific use scenario. Body Protection Complete suit protecting against chemicals, The type of protective equipment must be selected according to the concentration and amount of the dangerous substance at the specific workplace. Respiratory protection Where risk assessment shows air-purifying respirators are appropriate use a full-face particle respirator type N100 (US) or type P3 (EN 143) respirator cartridges as a backup to engineering controls. If the respirator is the sole means of protection, use a full-face supplied air respirator. Use respirators and components tested and approved under appropriate government standards such as NIOSH (US) or CEN (EU). Sigma-Aldrich - 06203 Page 4 of 14 Control of environmental exposure Prevent further leakage or spillage if safe to do so. Do not let product enter drains. Discharge into the environment must be avoided. SECTION 9: Physical and chemical properties 9.1 9.2 Information on basic physical and chemical properties a) Appearance Form: pellets Colour: white b) Odour odourless c) Odour Threshold no data available d) pH 14 at 50 g/l at 20 °C e) Melting point/freezing point Melting point/range: 318 °C f) Initial boiling point and boiling range 1,390 °C g) Flash point not applicable h) Evapouration rate no data available i) Flammability (solid, gas) no data available j) Upper/lower flammability or explosive limits no data available k) Vapour pressure < 24.00 hPa at 20 °C 4.00 hPa at 37 °C l) Vapour density 1.38 - (Air = 1.0) m) Relative density 2.1300 g/cm3 n) Water solubility ca.1,260 g/l at 20 °C o) Partition coefficient: noctanol/water no data available p) Auto-ignition temperature no data available q) Decomposition temperature no data available r) Viscosity no data available s) Explosive properties no data available t) Oxidizing properties no data available Other safety information Bulk density ca.1,150 kg/m3 Relative vapour density 1.38 - (Air = 1.0) SECTION 10: Stability and reactivity 10.1 Reactivity no data available 10.2 Chemical stability Stable under recommended storage conditions. 10.3 Possibility of hazardous reactions no data available Sigma-Aldrich - 06203 Page 5 of 14 10.4 Conditions to avoid no data available 10.5 Incompatible materials Strong oxidizing agents, Strong acids, Organic materials 10.6 Hazardous decomposition products Other decomposition products - no data available In the event of fire: see section 5 SECTION 11: Toxicological information 11.1 Information on toxicological effects Acute toxicity no data available Skin corrosion/irritation Skin - rabbit Result: Causes severe burns. - 24 h Serious eye damage/eye irritation Eyes - rabbit Result: Corrosive - 24 h Respiratory or skin sensitisation Will not occur Germ cell mutagenicity no data available Carcinogenicity IARC: No component of this product present at levels greater than or equal to 0.1% is identified as probable, possible or confirmed human carcinogen by IARC. Reproductive toxicity no data available Specific target organ toxicity - single exposure no data available Specific target organ toxicity - repeated exposure no data available Aspiration hazard no data available Additional Information RTECS: WB4900000 Material is extremely destructive to tissue of the mucous membranes and upper respiratory tract, eyes, and skin. SECTION 12: Ecological information 12.1 Toxicity Toxicity to fish LC50 - Gambusia affinis (Mosquito fish) - 125 mg/l - 96 h LC50 - Oncorhynchus mykiss (rainbow trout) - 45.4 mg/l - 96 h Toxicity to daphnia and other aquatic invertebrates 12.2 Immobilization EC50 - Daphnia - 40.38 mg/l - 48 h Persistence and degradability The methods for determining the biological degradability are not applicable to inorganic substances. Sigma-Aldrich - 06203 Page 6 of 14 12.3 Bioaccumulative potential no data available 12.4 Mobility in soil no data available 12.5 Results of PBT and vPvB assessment PBT/vPvB assessment not available as chemical safety assessment not required/not conducted 12.6 Other adverse effects Harmful to aquatic life. SECTION 13: Disposal considerations 13.1 Waste treatment methods Product Offer surplus and non-recyclable solutions to a licensed disposal company. Dissolve or mix the material with a combustible solvent and burn in a chemical incinerator equipped with an afterburner and scrubber. Contaminated packaging Dispose of as unused product. SECTION 14: Transport information 14.1 UN number ADR/RID: 1823 IMDG: 1823 IATA: 1823 14.2 UN proper shipping name ADR/RID: SODIUM HYDROXIDE, SOLID IMDG: SODIUM HYDROXIDE, SOLID IATA: Sodium hydroxide, solid 14.3 Transport hazard class(es) ADR/RID: 8 IMDG: 8 IATA: 8 Packaging group ADR/RID: II IMDG: II IATA: II Environmental hazards ADR/RID: no IMDG Marine pollutant: no IATA: no 14.4 14.5 14.6 Special precautions for user no data available SECTION 15: Regulatory information This safety datasheet complies with the requirements of Regulation (EC) No. 1907/2006. 15.1 Safety, health and environmental regulations/legislation specific for the substance or mixture no data available 15.2 Chemical Safety Assessment A Chemical Safety Assessment has been carried out for this substance. SECTION 16: Other information Full text of H-Statements referred to under sections 2 and 3. H290 H314 Met. Corr. Skin Corr. May be corrosive to metals. Causes severe skin burns and eye damage. Corrosive to metals Skin corrosion Full text of R-phrases referred to under sections 2 and 3 Sigma-Aldrich - 06203 Page 7 of 14 C R35 Corrosive Causes severe burns. Further information Copyright 2013 Sigma-Aldrich Co. LLC. License granted to make unlimited paper copies for internal use only. The above information is believed to be correct but does not purport to be all inclusive and shall be used only as a guide. The information in this document is based on the present state of our knowledge and is applicable to the product with regard to appropriate safety precautions. It does not represent any guarantee of the properties of the product. Sigma-Aldrich Corporation and its Affiliates shall not be held liable for any damage resulting from handling or from contact with the above product. See www.sigmaaldrich.com and/or the reverse side of invoice or packing slip for additional terms and conditions of sale. Sigma-Aldrich - 06203 Page 8 of 14 Annex: Exposure scenario Identified uses: Use: Used as chemical intermediate SU 3: Industrial uses: Uses of substances as such or in preparations at industrial sites SU 3, SU9: Industrial uses: Uses of substances as such or in preparations at industrial sites, Manufacture of fine chemicals PC19: Intermediate PROC1: Use in closed process, no likelihood of exposure PROC2: Use in closed, continuous process with occasional controlled exposure PROC3: Use in closed batch process (synthesis or formulation) PROC4: Use in batch and other process (synthesis) where opportunity for exposure arises PROC8b: Transfer of substance or preparation (charging/ discharging) from/ to vessels/ large containers at dedicated facilities PROC9: Transfer of substance or preparation into small containers (dedicated filling line, including weighing) PROC15: Use as laboratory reagent ERC1: Manufacture of substances Use: Formulation of preparations SU 3: Industrial uses: Uses of substances as such or in preparations at industrial sites SU 10: Formulation [mixing] of preparations and/ or re-packaging (excluding alloys) PROC1: Use in closed process, no likelihood of exposure PROC2: Use in closed, continuous process with occasional controlled exposure PROC3: Use in closed batch process (synthesis or formulation) PROC4: Use in batch and other process (synthesis) where opportunity for exposure arises PROC5: Mixing or blending in batch processes for formulation of preparations and articles (multistage and/ or significant contact) PROC8b: Transfer of substance or preparation (charging/ discharging) from/ to vessels/ large containers at dedicated facilities PROC9: Transfer of substance or preparation into small containers (dedicated filling line, including weighing) ERC2: Formulation of preparations Use: Used as laboratory reagent. SU 22: Professional uses: Public domain (administration, education, entertainment, services, craftsmen) SU 3, SU 22, SU24: Industrial uses: Uses of substances as such or in preparations at industrial sites, Professional uses: Public domain (administration, education, entertainment, services, craftsmen), Scientific research and development PC21: Laboratory chemicals PROC15: Use as laboratory reagent ERC4, ERC6a, ERC6b: Industrial use of processing aids in processes and products, not becoming part of articles, Industrial use resulting in manufacture of another substance (use of intermediates), Industrial use of reactive processing aids Use: Industrial use of processing aids in processes and products, not becoming part of articles SU 22: Professional uses: Public domain (administration, education, entertainment, services, craftsmen) SU 3, SU 22, SU24: Industrial uses: Uses of substances as such or in preparations at industrial sites, Professional uses: Public domain (administration, education, entertainment, services, craftsmen), Scientific research and development PC2: Adsorbents PC14: Metal surface treatment products, including galvanic and electroplating products PC15: Non-metal-surface treatment products PC20: Products such as ph-regulators, flocculants, pre-cipitants, neutralization agents PC35: Washing and cleaning products (including solvent based products) PROC5: Mixing or blending in batch processes for formulation of preparations and articles (multistage and/ or significant contact) PROC9: Transfer of substance or preparation into small containers (dedicated filling line, including weighing) Sigma-Aldrich - 06203 Page 9 of 14 PROC10: Roller application or brushing PROC11: Non industrial spraying PROC13: Treatment of articles by dipping and pouring PROC15: Use as laboratory reagent ERC4: Industrial use of processing aids in processes and products, not becoming part of articles 1. Short title of Exposure Scenario: Used as chemical intermediate Main User Groups Sectors of end-use Chemical product category Process categories Environmental Release Categories SU 3 SU 3, SU9 PC19 PROC1, PROC2, PROC3, PROC4, PROC8b, PROC9, PROC15 : ERC1: : : : : 2. Exposure scenario 2.1 Contributing scenario controlling environmental exposure for: ERC1 Product characteristics Concentration of the Substance in Mixture/Article : Covers the percentage of the substance in the product up to 100 % (unless stated differently). 2.2 Contributing scenario controlling worker exposure for: PROC1, PROC2, PROC3, PROC4, PROC8b, PROC9, PROC15, PC19 Product characteristics Concentration of the Substance in Mixture/Article Physical Form (at time of use) : Covers the percentage of the substance in the product up to 100 % (unless stated differently). : Solid, low dustiness Frequency and duration of use Application duration Frequency of use : >4h : 220 days/year Other operational conditions affecting workers exposure Outdoor / Indoor : Indoor Technical conditions and measures Provide adequate ventilation., Good work practice required. Organisational measures to prevent /limit releases, dispersion and exposure Ensure operatives are trained to minimise exposures. Conditions and measures related to personal protection, hygiene and health evaluation Use suitable eye protection and gloves., For personal protection see section 8. 3. Exposure estimation and reference to its source Environment A chemical safety assessment was performed according REACH Article 14(3), Annex I, sections 3 (Environmental Hazard assessment) and 4 (PBT/vPvB Assessment). As no hazard was identified, an exposure assessment and risk characterisation is not necessary (REACH Annex I section 5.0). Workers Contributing Scenario Exposure Assessment Method Specific conditions Value Level of Exposure RCR* PROC1 ECETOC TRA Inhalation 0.007 mg/m3 0.007 PROC2 ECETOC TRA Without Local Exhaust Ventilation Without Local Exhaust Inhalation 0.007 mg/m3 0.007 Sigma-Aldrich - 06203 Page 10 of 14 PROC3 ECETOC TRA PROC4 ECETOC TRA PROC8b ECETOC TRA PROC9 ECETOC TRA PROC15 ECETOC TRA Ventilation Without Local Exhaust Ventilation Without Local Exhaust Ventilation Without Local Exhaust Ventilation Without Local Exhaust Ventilation Without Local Exhaust Ventilation Inhalation 0.07 mg/m3 0.07 Inhalation 0.7 mg/m3 0.7 Inhalation 0.07 mg/m3 0.07 Inhalation 0.07 mg/m3 0.07 Inhalation 0.07 mg/m3 0.07 *Risk characterisation ratio 4. Guidance to Downstream User to evaluate whether he works inside the boundaries set by the Exposure Scenario Please refer to the following documents: ECHA Guidance on information requirements and chemical safety assessment Part D: Exposure Scenario Building, Part E: Risk Characterisation and Part G: Extending the SDS; VCI/Cefic REACH Practical Guides on Exposure Assessment and Communications in the Supply Chain; CEFIC Guidance Specific Environmental Release Categories (SPERCs). 1. Short title of Exposure Scenario: Formulation of preparations Main User Groups Sectors of end-use Process categories Environmental Release Categories : : : : SU 3 SU 10 PROC1, PROC2, PROC3, PROC4, PROC5, PROC8b, PROC9 ERC2: 2. Exposure scenario 2.1 Contributing scenario controlling environmental exposure for: ERC2 Product characteristics Concentration of the Substance in Mixture/Article : Covers the percentage of the substance in the product up to 100 % (unless stated differently). 2.2 Contributing scenario controlling worker exposure for: PROC1, PROC2, PROC3, PROC4, PROC5, PROC8b, PROC9 Product characteristics Concentration of the Substance in Mixture/Article Physical Form (at time of use) : Covers the percentage of the substance in the product up to 100 % (unless stated differently). : Solid, low dustiness Frequency and duration of use Application duration Frequency of use : >4h : 220 days/year Other operational conditions affecting workers exposure Outdoor / Indoor : Indoor Technical conditions and measures Provide adequate ventilation., Good work practice required. Organisational measures to prevent /limit releases, dispersion and exposure Ensure operatives are trained to minimise exposures. Conditions and measures related to personal protection, hygiene and health evaluation Use suitable eye protection and gloves., For personal protection see section 8. Sigma-Aldrich - 06203 Page 11 of 14 3. Exposure estimation and reference to its source Environment A chemical safety assessment was performed according REACH Article 14(3), Annex I, sections 3 (Environmental Hazard assessment) and 4 (PBT/vPvB Assessment). As no hazard was identified, an exposure assessment and risk characterisation is not necessary (REACH Annex I section 5.0). Workers Contributing Scenario Exposure Assessment Method Specific conditions Value Level of Exposure RCR* PROC1 ECETOC TRA Inhalation 0.007 mg/m3 0.007 PROC2 ECETOC TRA Inhalation 0.007 mg/m3 0.007 PROC3 ECETOC TRA Inhalation 0.07 mg/m3 0.07 PROC4 ECETOC TRA Inhalation 0.7 mg/m3 0.7 PROC5 ECETOC TRA Inhalation 0.7 mg/m3 0.7 PROC8b ECETOC TRA Inhalation 0.07 mg/m3 0.07 PROC9 ECETOC TRA Without Local Exhaust Ventilation Without Local Exhaust Ventilation Without Local Exhaust Ventilation Without Local Exhaust Ventilation Without Local Exhaust Ventilation Without Local Exhaust Ventilation Without Local Exhaust Ventilation Inhalation 0.07 mg/m3 0.07 *Risk characterisation ratio 4. Guidance to Downstream User to evaluate whether he works inside the boundaries set by the Exposure Scenario Please refer to the following documents: ECHA Guidance on information requirements and chemical safety assessment Part D: Exposure Scenario Building, Part E: Risk Characterisation and Part G: Extending the SDS; VCI/Cefic REACH Practical Guides on Exposure Assessment and Communications in the Supply Chain; CEFIC Guidance Specific Environmental Release Categories (SPERCs). 1. Short title of Exposure Scenario: Used as laboratory reagent. Main User Groups Sectors of end-use Chemical product category Process categories Environmental Release Categories : : : : : SU 22 SU 3, SU 22, SU24 PC21 PROC15 ERC4, ERC6a, ERC6b: 2. Exposure scenario 2.1 Contributing scenario controlling environmental exposure for: ERC4, ERC6a, ERC6b Product characteristics Concentration of the Substance in Mixture/Article : Covers the percentage of the substance in the product up to 100 % (unless stated differently). 2.2 Contributing scenario controlling worker exposure for: PROC15, PC21 Product characteristics Sigma-Aldrich - 06203 Page 12 of 14 Concentration of the Substance in Mixture/Article Physical Form (at time of use) : Covers the percentage of the substance in the product up to 100 % (unless stated differently). : Solid, low dustiness Frequency and duration of use Application duration Frequency of use : >4h : 220 days/year Other operational conditions affecting workers exposure Outdoor / Indoor : Indoor Technical conditions and measures Provide adequate ventilation., Good work practice required. Organisational measures to prevent /limit releases, dispersion and exposure Ensure operatives are trained to minimise exposures. Conditions and measures related to personal protection, hygiene and health evaluation Use suitable eye protection and gloves., For personal protection see section 8. 3. Exposure estimation and reference to its source Environment A chemical safety assessment was performed according REACH Article 14(3), Annex I, sections 3 (Environmental Hazard assessment) and 4 (PBT/vPvB Assessment). As no hazard was identified, an exposure assessment and risk characterisation is not necessary (REACH Annex I section 5.0). Workers Contributing Scenario Exposure Assessment Method Specific conditions Value Level of Exposure RCR* PROC15 ECETOC TRA Without Local Exhaust Ventilation Inhalation 0.07 mg/m3 0.07 *Risk characterisation ratio 4. Guidance to Downstream User to evaluate whether he works inside the boundaries set by the Exposure Scenario Please refer to the following documents: ECHA Guidance on information requirements and chemical safety assessment Part D: Exposure Scenario Building, Part E: Risk Characterisation and Part G: Extending the SDS; VCI/Cefic REACH Practical Guides on Exposure Assessment and Communications in the Supply Chain; CEFIC Guidance Specific Environmental Release Categories (SPERCs). 1. Short title of Exposure Scenario: Industrial use of processing aids in processes and products, not becoming part of articles Main User Groups Sectors of end-use Chemical product category Process categories Environmental Release Categories : : : : : SU 22 SU 3, SU 22, SU24 PC2, PC14, PC15, PC20, PC35 PROC5, PROC9, PROC10, PROC11, PROC13, PROC15 ERC4: 2. Exposure scenario 2.1 Contributing scenario controlling environmental exposure for: ERC4 Product characteristics Concentration of the Substance in Mixture/Article : Covers the percentage of the substance in the product up to 100 % (unless stated differently). 2.2 Contributing scenario controlling worker exposure for: PROC5, PROC9, PROC10, PROC11, PROC13, PROC15, PC2, PC14, PC15, PC20, PC35 Sigma-Aldrich - 06203 Page 13 of 14 Product characteristics Concentration of the Substance in Mixture/Article Physical Form (at time of use) : Covers the percentage of the substance in the product up to 100 % (unless stated differently). : Solid, low dustiness Frequency and duration of use Application duration Frequency of use : >4h : 220 days/year Other operational conditions affecting workers exposure Outdoor / Indoor : Indoor Technical conditions and measures Provide adequate ventilation., Good work practice required. Organisational measures to prevent /limit releases, dispersion and exposure Ensure operatives are trained to minimise exposures. Conditions and measures related to personal protection, hygiene and health evaluation Use suitable eye protection and gloves., For personal protection see section 8. 3. Exposure estimation and reference to its source Environment A chemical safety assessment was performed according REACH Article 14(3), Annex I, sections 3 (Environmental Hazard assessment) and 4 (PBT/vPvB Assessment). As no hazard was identified, an exposure assessment and risk characterisation is not necessary (REACH Annex I section 5.0). Workers Contributing Scenario Exposure Assessment Method Specific conditions Value Level of Exposure RCR* PROC5 ECETOC TRA Inhalation 0.7 mg/m3 0.7 PROC9 ECETOC TRA Inhalation 0.07 mg/m3 0.07 PROC10 ECETOC TRA Inhalation 0.35 mg/m3 0.35 PROC11 ECETOC TRA Inhalation 0.7 mg/m3 0.7 PROC13 ECETOC TRA Inhalation 0.35 mg/m3 0.35 PROC15 ECETOC TRA Without Local Exhaust Ventilation Without Local Exhaust Ventilation Without Local Exhaust Ventilation Without Local Exhaust Ventilation Without Local Exhaust Ventilation Without Local Exhaust Ventilation Inhalation 0.07 mg/m3 0.07 *Risk characterisation ratio 4. Guidance to Downstream User to evaluate whether he works inside the boundaries set by the Exposure Scenario Please refer to the following documents: ECHA Guidance on information requirements and chemical safety assessment Part D: Exposure Scenario Building, Part E: Risk Characterisation and Part G: Extending the SDS; VCI/Cefic REACH Practical Guides on Exposure Assessment and Communications in the Supply Chain; CEFIC Guidance Specific Environmental Release Categories (SPERCs). Sigma-Aldrich - 06203 Page 14 of 14